purinton



2 Sheets-sheet 1. F. M. PURINTON.

Patented Aug. 30, 1887.

I I I. I I I I I My I INVEN TCIR.

II I I I I I I II I I I ETERSPmLn mph! 5! DC (No Model.)

MACHINE FOR REMOVING BARK FROM LOGS.

WITNESSES.

(No Model.) 2 Sheets-Sheefi-2.

P. M. PURINTON.

MACHINE FOB. REMOVING BARK FROM LOGS.

No. 368,968. Patented Aug. 30, 1887;.

INVENTUFM N ETERS, FhalwL'rlhcgnphM. Washin w. D4 0 UNITED STATES PATENT OFFI E.

FRANK M. PURINTON, OF PROVIDENCE, RHODE ISLAND.

MACHINE FOR REMOVINGYBARK FROM Loos.-

SPECIPICATION'forming part of Letters Patent No. 368,968, dated August 30, 1887.

Application filed July 17, 1886. Serial No. 208,231. (No model.)

To all whom it may concern.-

Be it known that I, FRANK M. PURINTON,

V of Providence, in the State of Rhode Island,

have invented a new and useful Machine for Removing Bark from Logs; and I do hereby declare that the following specification, taken in connection with the drawings making apart of the same, is a full, clear, and exact description thereof.

Figure 1 is a front elevation of the machine. Fig. 2 is a top view of same. Fig. 3 is an end view. Fig. 4 isa vertical section on w m. Fig.

'5 is a cross-section of cutter-cylinder and bearings a'cutter-cylinder, B. To the circumference of the cylinder B, I secure a series of knives, O, the edges of which stand at a suit able angle to its axis. These cutting-knives may be arranged upon the cylinder in a variety of ways. In my invention I make use of continuous knives running spirally and extending lengthwise of the cylinder. A series of shorter knives arranged spirally upon the cylinder may be used, however, with good effeet, and their position and length may be varied in other ways. To the end of the shaft of the cylinder B a pulley may be attached and power communicated by means of a belt. Dis a lower shaft resting in bearings Within the frame of the machine, and which supports a horizontal frame or table, E, attached thereto by means of collars f f and set-screws g g.

Upon the frame or table E is attached and supported the log-frame H, which consists of a horizontal beam, I, having at each end vertical ears J J. The log K is supported upon centers Z l. The center Z is fixed in the ear J, and the center I is secured by a set-screw frame H is secured to the table E at one end by a pivot, 19, while the other end is capable of horizontal adjustment through the slot N of lug q of beam I and the set-screw r. v

S S are springs wound upon the shaft D, and having one end attached to the frame E, and serve to force the log into contact with the knives upon the rotating cylinder B.

T is a lever attached to the end of the shaft D outside of the frame, and is designed to be used in throwing the log-frame H backward or forward, as occasion may require, and is retained in any desired position by means of a rack and pawl, V. A buffer, W, prevents any severe concussion to the frame from the action of the springs.

In operating my improved machine the logframe is thrown back against the resist-anceof the springs S S by lever T and held by the rack and pawl. The log is then placed upon the centers, the center Z being adjusted to suit any slight variation in lengths, and a swinging adjustment of the frame H made to allow for any difference in diameter between the ends of the log. The cylinder B is next started, after which the pawl is thrown out and the surface of the log brought within the stroke of the knives by the action of the springs S S. As fast as the bark is removedby the knives the log is turned by the attend ant, by means of the crank 0, until the whole is taken off, when the log is removed and another substituted.

.What I claim as my invention, and desire to secure by Letters Patent, is

The combination of a rotating cylinder, B, having cutting-knives O, a swinging frame,E, shaft D, and spring-connection between the shaft and frame,and the frame H,pivoted upon frame E at one end and having means for horizontally adjusting it at the other end, and means for holding the log, as set forth.

FRANK M. PURINION. 

